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b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/slab.h> | |
ba5c1e9b | 26 | #include <linux/timer.h> |
cbb870c8 | 27 | #include <asm/asm-offsets.h> |
b0c632db HC |
28 | #include <asm/lowcore.h> |
29 | #include <asm/pgtable.h> | |
f5daba1d | 30 | #include <asm/nmi.h> |
a0616cde | 31 | #include <asm/switch_to.h> |
78c4b59f | 32 | #include <asm/facility.h> |
1526bf9c | 33 | #include <asm/sclp.h> |
8f2abe6a | 34 | #include "kvm-s390.h" |
b0c632db HC |
35 | #include "gaccess.h" |
36 | ||
5786fffa CH |
37 | #define CREATE_TRACE_POINTS |
38 | #include "trace.h" | |
ade38c31 | 39 | #include "trace-s390.h" |
5786fffa | 40 | |
b0c632db HC |
41 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
42 | ||
43 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
44 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 45 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
46 | { "exit_validity", VCPU_STAT(exit_validity) }, |
47 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
48 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
49 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
50 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
51 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
52 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 53 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
54 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
55 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
7697e71f | 56 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
57 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
58 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
59 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
60 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
61 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
62 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
63 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 64 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
65 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
66 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
67 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
68 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
69 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
70 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
71 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 72 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
73 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
74 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 75 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 76 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 77 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 78 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
79 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
80 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
81 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
82 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
83 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 84 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 85 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 86 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
87 | { NULL } |
88 | }; | |
89 | ||
78c4b59f | 90 | unsigned long *vfacilities; |
2c70fe44 | 91 | static struct gmap_notifier gmap_notifier; |
b0c632db | 92 | |
78c4b59f | 93 | /* test availability of vfacility */ |
280ef0f1 | 94 | int test_vfacility(unsigned long nr) |
78c4b59f MM |
95 | { |
96 | return __test_facility(nr, (void *) vfacilities); | |
97 | } | |
98 | ||
b0c632db | 99 | /* Section: not file related */ |
10474ae8 | 100 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
101 | { |
102 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 103 | return 0; |
b0c632db HC |
104 | } |
105 | ||
106 | void kvm_arch_hardware_disable(void *garbage) | |
107 | { | |
108 | } | |
109 | ||
2c70fe44 CB |
110 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
111 | ||
b0c632db HC |
112 | int kvm_arch_hardware_setup(void) |
113 | { | |
2c70fe44 CB |
114 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
115 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
116 | return 0; |
117 | } | |
118 | ||
119 | void kvm_arch_hardware_unsetup(void) | |
120 | { | |
2c70fe44 | 121 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
122 | } |
123 | ||
124 | void kvm_arch_check_processor_compat(void *rtn) | |
125 | { | |
126 | } | |
127 | ||
128 | int kvm_arch_init(void *opaque) | |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
133 | void kvm_arch_exit(void) | |
134 | { | |
135 | } | |
136 | ||
137 | /* Section: device related */ | |
138 | long kvm_arch_dev_ioctl(struct file *filp, | |
139 | unsigned int ioctl, unsigned long arg) | |
140 | { | |
141 | if (ioctl == KVM_S390_ENABLE_SIE) | |
142 | return s390_enable_sie(); | |
143 | return -EINVAL; | |
144 | } | |
145 | ||
146 | int kvm_dev_ioctl_check_extension(long ext) | |
147 | { | |
d7b0b5eb CO |
148 | int r; |
149 | ||
2bd0ac4e | 150 | switch (ext) { |
d7b0b5eb | 151 | case KVM_CAP_S390_PSW: |
b6cf8788 | 152 | case KVM_CAP_S390_GMAP: |
52e16b18 | 153 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
154 | #ifdef CONFIG_KVM_S390_UCONTROL |
155 | case KVM_CAP_S390_UCONTROL: | |
156 | #endif | |
3c038e6b | 157 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 158 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 159 | case KVM_CAP_ONE_REG: |
d6712df9 | 160 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 161 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 162 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 163 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 164 | case KVM_CAP_ENABLE_CAP_VM: |
f2061656 | 165 | case KVM_CAP_VM_ATTRIBUTES: |
d7b0b5eb CO |
166 | r = 1; |
167 | break; | |
e726b1bd CB |
168 | case KVM_CAP_NR_VCPUS: |
169 | case KVM_CAP_MAX_VCPUS: | |
170 | r = KVM_MAX_VCPUS; | |
171 | break; | |
e1e2e605 NW |
172 | case KVM_CAP_NR_MEMSLOTS: |
173 | r = KVM_USER_MEM_SLOTS; | |
174 | break; | |
1526bf9c | 175 | case KVM_CAP_S390_COW: |
abf09bed | 176 | r = MACHINE_HAS_ESOP; |
1526bf9c | 177 | break; |
2bd0ac4e | 178 | default: |
d7b0b5eb | 179 | r = 0; |
2bd0ac4e | 180 | } |
d7b0b5eb | 181 | return r; |
b0c632db HC |
182 | } |
183 | ||
15f36ebd JH |
184 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
185 | struct kvm_memory_slot *memslot) | |
186 | { | |
187 | gfn_t cur_gfn, last_gfn; | |
188 | unsigned long address; | |
189 | struct gmap *gmap = kvm->arch.gmap; | |
190 | ||
191 | down_read(&gmap->mm->mmap_sem); | |
192 | /* Loop over all guest pages */ | |
193 | last_gfn = memslot->base_gfn + memslot->npages; | |
194 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
195 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
196 | ||
197 | if (gmap_test_and_clear_dirty(address, gmap)) | |
198 | mark_page_dirty(kvm, cur_gfn); | |
199 | } | |
200 | up_read(&gmap->mm->mmap_sem); | |
201 | } | |
202 | ||
b0c632db HC |
203 | /* Section: vm related */ |
204 | /* | |
205 | * Get (and clear) the dirty memory log for a memory slot. | |
206 | */ | |
207 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
208 | struct kvm_dirty_log *log) | |
209 | { | |
15f36ebd JH |
210 | int r; |
211 | unsigned long n; | |
212 | struct kvm_memory_slot *memslot; | |
213 | int is_dirty = 0; | |
214 | ||
215 | mutex_lock(&kvm->slots_lock); | |
216 | ||
217 | r = -EINVAL; | |
218 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
219 | goto out; | |
220 | ||
221 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
222 | r = -ENOENT; | |
223 | if (!memslot->dirty_bitmap) | |
224 | goto out; | |
225 | ||
226 | kvm_s390_sync_dirty_log(kvm, memslot); | |
227 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
228 | if (r) | |
229 | goto out; | |
230 | ||
231 | /* Clear the dirty log */ | |
232 | if (is_dirty) { | |
233 | n = kvm_dirty_bitmap_bytes(memslot); | |
234 | memset(memslot->dirty_bitmap, 0, n); | |
235 | } | |
236 | r = 0; | |
237 | out: | |
238 | mutex_unlock(&kvm->slots_lock); | |
239 | return r; | |
b0c632db HC |
240 | } |
241 | ||
d938dc55 CH |
242 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
243 | { | |
244 | int r; | |
245 | ||
246 | if (cap->flags) | |
247 | return -EINVAL; | |
248 | ||
249 | switch (cap->cap) { | |
84223598 CH |
250 | case KVM_CAP_S390_IRQCHIP: |
251 | kvm->arch.use_irqchip = 1; | |
252 | r = 0; | |
253 | break; | |
d938dc55 CH |
254 | default: |
255 | r = -EINVAL; | |
256 | break; | |
257 | } | |
258 | return r; | |
259 | } | |
260 | ||
4f718eab DD |
261 | static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
262 | { | |
263 | int ret; | |
264 | unsigned int idx; | |
265 | switch (attr->attr) { | |
266 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
267 | ret = -EBUSY; | |
268 | mutex_lock(&kvm->lock); | |
269 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
270 | kvm->arch.use_cmma = 1; | |
271 | ret = 0; | |
272 | } | |
273 | mutex_unlock(&kvm->lock); | |
274 | break; | |
275 | case KVM_S390_VM_MEM_CLR_CMMA: | |
276 | mutex_lock(&kvm->lock); | |
277 | idx = srcu_read_lock(&kvm->srcu); | |
278 | page_table_reset_pgste(kvm->arch.gmap->mm, 0, TASK_SIZE, false); | |
279 | srcu_read_unlock(&kvm->srcu, idx); | |
280 | mutex_unlock(&kvm->lock); | |
281 | ret = 0; | |
282 | break; | |
283 | default: | |
284 | ret = -ENXIO; | |
285 | break; | |
286 | } | |
287 | return ret; | |
288 | } | |
289 | ||
f2061656 DD |
290 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
291 | { | |
292 | int ret; | |
293 | ||
294 | switch (attr->group) { | |
4f718eab DD |
295 | case KVM_S390_VM_MEM_CTRL: |
296 | ret = kvm_s390_mem_control(kvm, attr); | |
297 | break; | |
f2061656 DD |
298 | default: |
299 | ret = -ENXIO; | |
300 | break; | |
301 | } | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
307 | { | |
308 | return -ENXIO; | |
309 | } | |
310 | ||
311 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
312 | { | |
313 | int ret; | |
314 | ||
315 | switch (attr->group) { | |
4f718eab DD |
316 | case KVM_S390_VM_MEM_CTRL: |
317 | switch (attr->attr) { | |
318 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
319 | case KVM_S390_VM_MEM_CLR_CMMA: | |
320 | ret = 0; | |
321 | break; | |
322 | default: | |
323 | ret = -ENXIO; | |
324 | break; | |
325 | } | |
326 | break; | |
f2061656 DD |
327 | default: |
328 | ret = -ENXIO; | |
329 | break; | |
330 | } | |
331 | ||
332 | return ret; | |
333 | } | |
334 | ||
b0c632db HC |
335 | long kvm_arch_vm_ioctl(struct file *filp, |
336 | unsigned int ioctl, unsigned long arg) | |
337 | { | |
338 | struct kvm *kvm = filp->private_data; | |
339 | void __user *argp = (void __user *)arg; | |
f2061656 | 340 | struct kvm_device_attr attr; |
b0c632db HC |
341 | int r; |
342 | ||
343 | switch (ioctl) { | |
ba5c1e9b CO |
344 | case KVM_S390_INTERRUPT: { |
345 | struct kvm_s390_interrupt s390int; | |
346 | ||
347 | r = -EFAULT; | |
348 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
349 | break; | |
350 | r = kvm_s390_inject_vm(kvm, &s390int); | |
351 | break; | |
352 | } | |
d938dc55 CH |
353 | case KVM_ENABLE_CAP: { |
354 | struct kvm_enable_cap cap; | |
355 | r = -EFAULT; | |
356 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
357 | break; | |
358 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
359 | break; | |
360 | } | |
84223598 CH |
361 | case KVM_CREATE_IRQCHIP: { |
362 | struct kvm_irq_routing_entry routing; | |
363 | ||
364 | r = -EINVAL; | |
365 | if (kvm->arch.use_irqchip) { | |
366 | /* Set up dummy routing. */ | |
367 | memset(&routing, 0, sizeof(routing)); | |
368 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
369 | r = 0; | |
370 | } | |
371 | break; | |
372 | } | |
f2061656 DD |
373 | case KVM_SET_DEVICE_ATTR: { |
374 | r = -EFAULT; | |
375 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
376 | break; | |
377 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
378 | break; | |
379 | } | |
380 | case KVM_GET_DEVICE_ATTR: { | |
381 | r = -EFAULT; | |
382 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
383 | break; | |
384 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
385 | break; | |
386 | } | |
387 | case KVM_HAS_DEVICE_ATTR: { | |
388 | r = -EFAULT; | |
389 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
390 | break; | |
391 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
392 | break; | |
393 | } | |
b0c632db | 394 | default: |
367e1319 | 395 | r = -ENOTTY; |
b0c632db HC |
396 | } |
397 | ||
398 | return r; | |
399 | } | |
400 | ||
e08b9637 | 401 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 402 | { |
b0c632db HC |
403 | int rc; |
404 | char debug_name[16]; | |
f6c137ff | 405 | static unsigned long sca_offset; |
b0c632db | 406 | |
e08b9637 CO |
407 | rc = -EINVAL; |
408 | #ifdef CONFIG_KVM_S390_UCONTROL | |
409 | if (type & ~KVM_VM_S390_UCONTROL) | |
410 | goto out_err; | |
411 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
412 | goto out_err; | |
413 | #else | |
414 | if (type) | |
415 | goto out_err; | |
416 | #endif | |
417 | ||
b0c632db HC |
418 | rc = s390_enable_sie(); |
419 | if (rc) | |
d89f5eff | 420 | goto out_err; |
b0c632db | 421 | |
b290411a CO |
422 | rc = -ENOMEM; |
423 | ||
b0c632db HC |
424 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
425 | if (!kvm->arch.sca) | |
d89f5eff | 426 | goto out_err; |
f6c137ff CB |
427 | spin_lock(&kvm_lock); |
428 | sca_offset = (sca_offset + 16) & 0x7f0; | |
429 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
430 | spin_unlock(&kvm_lock); | |
b0c632db HC |
431 | |
432 | sprintf(debug_name, "kvm-%u", current->pid); | |
433 | ||
434 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
435 | if (!kvm->arch.dbf) | |
436 | goto out_nodbf; | |
437 | ||
ba5c1e9b CO |
438 | spin_lock_init(&kvm->arch.float_int.lock); |
439 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
440 | ||
b0c632db HC |
441 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
442 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
443 | ||
e08b9637 CO |
444 | if (type & KVM_VM_S390_UCONTROL) { |
445 | kvm->arch.gmap = NULL; | |
446 | } else { | |
447 | kvm->arch.gmap = gmap_alloc(current->mm); | |
448 | if (!kvm->arch.gmap) | |
449 | goto out_nogmap; | |
2c70fe44 | 450 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 451 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 452 | } |
fa6b7fe9 CH |
453 | |
454 | kvm->arch.css_support = 0; | |
84223598 | 455 | kvm->arch.use_irqchip = 0; |
fa6b7fe9 | 456 | |
d89f5eff | 457 | return 0; |
598841ca CO |
458 | out_nogmap: |
459 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
460 | out_nodbf: |
461 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
462 | out_err: |
463 | return rc; | |
b0c632db HC |
464 | } |
465 | ||
d329c035 CB |
466 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
467 | { | |
468 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 469 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
3c038e6b | 470 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
471 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
472 | clear_bit(63 - vcpu->vcpu_id, | |
473 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
474 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
475 | (__u64) vcpu->arch.sie_block) | |
476 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
477 | } | |
abf4a71e | 478 | smp_mb(); |
27e0393f CO |
479 | |
480 | if (kvm_is_ucontrol(vcpu->kvm)) | |
481 | gmap_free(vcpu->arch.gmap); | |
482 | ||
b31605c1 DD |
483 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
484 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 485 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 486 | |
6692cef3 | 487 | kvm_vcpu_uninit(vcpu); |
b110feaf | 488 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
489 | } |
490 | ||
491 | static void kvm_free_vcpus(struct kvm *kvm) | |
492 | { | |
493 | unsigned int i; | |
988a2cae | 494 | struct kvm_vcpu *vcpu; |
d329c035 | 495 | |
988a2cae GN |
496 | kvm_for_each_vcpu(i, vcpu, kvm) |
497 | kvm_arch_vcpu_destroy(vcpu); | |
498 | ||
499 | mutex_lock(&kvm->lock); | |
500 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
501 | kvm->vcpus[i] = NULL; | |
502 | ||
503 | atomic_set(&kvm->online_vcpus, 0); | |
504 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
505 | } |
506 | ||
ad8ba2cd SY |
507 | void kvm_arch_sync_events(struct kvm *kvm) |
508 | { | |
509 | } | |
510 | ||
b0c632db HC |
511 | void kvm_arch_destroy_vm(struct kvm *kvm) |
512 | { | |
d329c035 | 513 | kvm_free_vcpus(kvm); |
b0c632db | 514 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 515 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
516 | if (!kvm_is_ucontrol(kvm)) |
517 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 518 | kvm_s390_destroy_adapters(kvm); |
b0c632db HC |
519 | } |
520 | ||
521 | /* Section: vcpu related */ | |
522 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
523 | { | |
3c038e6b DD |
524 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
525 | kvm_clear_async_pf_completion_queue(vcpu); | |
27e0393f CO |
526 | if (kvm_is_ucontrol(vcpu->kvm)) { |
527 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
528 | if (!vcpu->arch.gmap) | |
529 | return -ENOMEM; | |
2c70fe44 | 530 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
531 | return 0; |
532 | } | |
533 | ||
598841ca | 534 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
535 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
536 | KVM_SYNC_GPRS | | |
9eed0735 CB |
537 | KVM_SYNC_ACRS | |
538 | KVM_SYNC_CRS; | |
b0c632db HC |
539 | return 0; |
540 | } | |
541 | ||
542 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
543 | { | |
6692cef3 | 544 | /* Nothing todo */ |
b0c632db HC |
545 | } |
546 | ||
547 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
548 | { | |
4725c860 MS |
549 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
550 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 551 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
552 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
553 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 554 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 555 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 556 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
557 | } |
558 | ||
559 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
560 | { | |
9e6dabef | 561 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 562 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
563 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
564 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 565 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
566 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
567 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
568 | restore_access_regs(vcpu->arch.host_acrs); |
569 | } | |
570 | ||
571 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
572 | { | |
573 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
574 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
575 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 576 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
577 | vcpu->arch.sie_block->cputm = 0UL; |
578 | vcpu->arch.sie_block->ckc = 0UL; | |
579 | vcpu->arch.sie_block->todpr = 0; | |
580 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
581 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
582 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
583 | vcpu->arch.guest_fpregs.fpc = 0; | |
584 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
585 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 586 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
587 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
588 | kvm_clear_async_pf_completion_queue(vcpu); | |
61bde82c | 589 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
2ed10cc1 | 590 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
591 | } |
592 | ||
42897d86 MT |
593 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
594 | { | |
595 | return 0; | |
596 | } | |
597 | ||
b31605c1 DD |
598 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
599 | { | |
600 | free_page(vcpu->arch.sie_block->cbrlo); | |
601 | vcpu->arch.sie_block->cbrlo = 0; | |
602 | } | |
603 | ||
604 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
605 | { | |
606 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
607 | if (!vcpu->arch.sie_block->cbrlo) | |
608 | return -ENOMEM; | |
609 | ||
610 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
611 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
612 | return 0; | |
613 | } | |
614 | ||
b0c632db HC |
615 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
616 | { | |
b31605c1 | 617 | int rc = 0; |
b31288fa | 618 | |
9e6dabef CH |
619 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
620 | CPUSTAT_SM | | |
69d0d3a3 CB |
621 | CPUSTAT_STOPPED | |
622 | CPUSTAT_GED); | |
fc34531d | 623 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
624 | if (test_vfacility(50) && test_vfacility(73)) |
625 | vcpu->arch.sie_block->ecb |= 0x10; | |
626 | ||
69d0d3a3 | 627 | vcpu->arch.sie_block->ecb2 = 8; |
217a4406 HC |
628 | vcpu->arch.sie_block->eca = 0xC1002000U; |
629 | if (sclp_has_siif()) | |
630 | vcpu->arch.sie_block->eca |= 1; | |
78c4b59f | 631 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
693ffc08 | 632 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
b31605c1 DD |
633 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
634 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
635 | if (rc) | |
636 | return rc; | |
b31288fa | 637 | } |
ca872302 CB |
638 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
639 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
640 | (unsigned long) vcpu); | |
641 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 642 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 643 | vcpu->arch.cpu_id.version = 0xff; |
b31605c1 | 644 | return rc; |
b0c632db HC |
645 | } |
646 | ||
647 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
648 | unsigned int id) | |
649 | { | |
4d47555a | 650 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 651 | struct sie_page *sie_page; |
4d47555a CO |
652 | int rc = -EINVAL; |
653 | ||
654 | if (id >= KVM_MAX_VCPUS) | |
655 | goto out; | |
656 | ||
657 | rc = -ENOMEM; | |
b0c632db | 658 | |
b110feaf | 659 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 660 | if (!vcpu) |
4d47555a | 661 | goto out; |
b0c632db | 662 | |
7feb6bb8 MM |
663 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
664 | if (!sie_page) | |
b0c632db HC |
665 | goto out_free_cpu; |
666 | ||
7feb6bb8 MM |
667 | vcpu->arch.sie_block = &sie_page->sie_block; |
668 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
669 | ||
b0c632db | 670 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
671 | if (!kvm_is_ucontrol(kvm)) { |
672 | if (!kvm->arch.sca) { | |
673 | WARN_ON_ONCE(1); | |
674 | goto out_free_cpu; | |
675 | } | |
676 | if (!kvm->arch.sca->cpu[id].sda) | |
677 | kvm->arch.sca->cpu[id].sda = | |
678 | (__u64) vcpu->arch.sie_block; | |
679 | vcpu->arch.sie_block->scaoh = | |
680 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
681 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
682 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
683 | } | |
b0c632db | 684 | |
ba5c1e9b CO |
685 | spin_lock_init(&vcpu->arch.local_int.lock); |
686 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
687 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
d0321a24 | 688 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 689 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 690 | |
b0c632db HC |
691 | rc = kvm_vcpu_init(vcpu, kvm, id); |
692 | if (rc) | |
7b06bf2f | 693 | goto out_free_sie_block; |
b0c632db HC |
694 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
695 | vcpu->arch.sie_block); | |
ade38c31 | 696 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 697 | |
b0c632db | 698 | return vcpu; |
7b06bf2f WY |
699 | out_free_sie_block: |
700 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 701 | out_free_cpu: |
b110feaf | 702 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 703 | out: |
b0c632db HC |
704 | return ERR_PTR(rc); |
705 | } | |
706 | ||
b0c632db HC |
707 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
708 | { | |
f87618e8 | 709 | return kvm_cpu_has_interrupt(vcpu); |
b0c632db HC |
710 | } |
711 | ||
49b99e1e CB |
712 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
713 | { | |
714 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
715 | } | |
716 | ||
717 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
718 | { | |
719 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
720 | } | |
721 | ||
722 | /* | |
723 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
724 | * If the CPU is not running (e.g. waiting as idle) the function will | |
725 | * return immediately. */ | |
726 | void exit_sie(struct kvm_vcpu *vcpu) | |
727 | { | |
728 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
729 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
730 | cpu_relax(); | |
731 | } | |
732 | ||
733 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
734 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
735 | { | |
736 | s390_vcpu_block(vcpu); | |
737 | exit_sie(vcpu); | |
738 | } | |
739 | ||
2c70fe44 CB |
740 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
741 | { | |
742 | int i; | |
743 | struct kvm *kvm = gmap->private; | |
744 | struct kvm_vcpu *vcpu; | |
745 | ||
746 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
747 | /* match against both prefix pages */ | |
748 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { | |
749 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); | |
750 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
751 | exit_sie_sync(vcpu); | |
752 | } | |
753 | } | |
754 | } | |
755 | ||
b6d33834 CD |
756 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
757 | { | |
758 | /* kvm common code refers to this, but never calls it */ | |
759 | BUG(); | |
760 | return 0; | |
761 | } | |
762 | ||
14eebd91 CO |
763 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
764 | struct kvm_one_reg *reg) | |
765 | { | |
766 | int r = -EINVAL; | |
767 | ||
768 | switch (reg->id) { | |
29b7c71b CO |
769 | case KVM_REG_S390_TODPR: |
770 | r = put_user(vcpu->arch.sie_block->todpr, | |
771 | (u32 __user *)reg->addr); | |
772 | break; | |
773 | case KVM_REG_S390_EPOCHDIFF: | |
774 | r = put_user(vcpu->arch.sie_block->epoch, | |
775 | (u64 __user *)reg->addr); | |
776 | break; | |
46a6dd1c J |
777 | case KVM_REG_S390_CPU_TIMER: |
778 | r = put_user(vcpu->arch.sie_block->cputm, | |
779 | (u64 __user *)reg->addr); | |
780 | break; | |
781 | case KVM_REG_S390_CLOCK_COMP: | |
782 | r = put_user(vcpu->arch.sie_block->ckc, | |
783 | (u64 __user *)reg->addr); | |
784 | break; | |
536336c2 DD |
785 | case KVM_REG_S390_PFTOKEN: |
786 | r = put_user(vcpu->arch.pfault_token, | |
787 | (u64 __user *)reg->addr); | |
788 | break; | |
789 | case KVM_REG_S390_PFCOMPARE: | |
790 | r = put_user(vcpu->arch.pfault_compare, | |
791 | (u64 __user *)reg->addr); | |
792 | break; | |
793 | case KVM_REG_S390_PFSELECT: | |
794 | r = put_user(vcpu->arch.pfault_select, | |
795 | (u64 __user *)reg->addr); | |
796 | break; | |
672550fb CB |
797 | case KVM_REG_S390_PP: |
798 | r = put_user(vcpu->arch.sie_block->pp, | |
799 | (u64 __user *)reg->addr); | |
800 | break; | |
afa45ff5 CB |
801 | case KVM_REG_S390_GBEA: |
802 | r = put_user(vcpu->arch.sie_block->gbea, | |
803 | (u64 __user *)reg->addr); | |
804 | break; | |
14eebd91 CO |
805 | default: |
806 | break; | |
807 | } | |
808 | ||
809 | return r; | |
810 | } | |
811 | ||
812 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
813 | struct kvm_one_reg *reg) | |
814 | { | |
815 | int r = -EINVAL; | |
816 | ||
817 | switch (reg->id) { | |
29b7c71b CO |
818 | case KVM_REG_S390_TODPR: |
819 | r = get_user(vcpu->arch.sie_block->todpr, | |
820 | (u32 __user *)reg->addr); | |
821 | break; | |
822 | case KVM_REG_S390_EPOCHDIFF: | |
823 | r = get_user(vcpu->arch.sie_block->epoch, | |
824 | (u64 __user *)reg->addr); | |
825 | break; | |
46a6dd1c J |
826 | case KVM_REG_S390_CPU_TIMER: |
827 | r = get_user(vcpu->arch.sie_block->cputm, | |
828 | (u64 __user *)reg->addr); | |
829 | break; | |
830 | case KVM_REG_S390_CLOCK_COMP: | |
831 | r = get_user(vcpu->arch.sie_block->ckc, | |
832 | (u64 __user *)reg->addr); | |
833 | break; | |
536336c2 DD |
834 | case KVM_REG_S390_PFTOKEN: |
835 | r = get_user(vcpu->arch.pfault_token, | |
836 | (u64 __user *)reg->addr); | |
837 | break; | |
838 | case KVM_REG_S390_PFCOMPARE: | |
839 | r = get_user(vcpu->arch.pfault_compare, | |
840 | (u64 __user *)reg->addr); | |
841 | break; | |
842 | case KVM_REG_S390_PFSELECT: | |
843 | r = get_user(vcpu->arch.pfault_select, | |
844 | (u64 __user *)reg->addr); | |
845 | break; | |
672550fb CB |
846 | case KVM_REG_S390_PP: |
847 | r = get_user(vcpu->arch.sie_block->pp, | |
848 | (u64 __user *)reg->addr); | |
849 | break; | |
afa45ff5 CB |
850 | case KVM_REG_S390_GBEA: |
851 | r = get_user(vcpu->arch.sie_block->gbea, | |
852 | (u64 __user *)reg->addr); | |
853 | break; | |
14eebd91 CO |
854 | default: |
855 | break; | |
856 | } | |
857 | ||
858 | return r; | |
859 | } | |
b6d33834 | 860 | |
b0c632db HC |
861 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
862 | { | |
b0c632db | 863 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
864 | return 0; |
865 | } | |
866 | ||
867 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
868 | { | |
5a32c1af | 869 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
870 | return 0; |
871 | } | |
872 | ||
873 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
874 | { | |
5a32c1af | 875 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
876 | return 0; |
877 | } | |
878 | ||
879 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
880 | struct kvm_sregs *sregs) | |
881 | { | |
59674c1a | 882 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 883 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 884 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
885 | return 0; |
886 | } | |
887 | ||
888 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
889 | struct kvm_sregs *sregs) | |
890 | { | |
59674c1a | 891 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 892 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
893 | return 0; |
894 | } | |
895 | ||
896 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
897 | { | |
4725c860 MS |
898 | if (test_fp_ctl(fpu->fpc)) |
899 | return -EINVAL; | |
b0c632db | 900 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
901 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
902 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
903 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
904 | return 0; |
905 | } | |
906 | ||
907 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
908 | { | |
b0c632db HC |
909 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
910 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
911 | return 0; |
912 | } | |
913 | ||
914 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
915 | { | |
916 | int rc = 0; | |
917 | ||
9e6dabef | 918 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 919 | rc = -EBUSY; |
d7b0b5eb CO |
920 | else { |
921 | vcpu->run->psw_mask = psw.mask; | |
922 | vcpu->run->psw_addr = psw.addr; | |
923 | } | |
b0c632db HC |
924 | return rc; |
925 | } | |
926 | ||
927 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
928 | struct kvm_translation *tr) | |
929 | { | |
930 | return -EINVAL; /* not implemented yet */ | |
931 | } | |
932 | ||
d0bfb940 JK |
933 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
934 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
935 | { |
936 | return -EINVAL; /* not implemented yet */ | |
937 | } | |
938 | ||
62d9f0db MT |
939 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
940 | struct kvm_mp_state *mp_state) | |
941 | { | |
942 | return -EINVAL; /* not implemented yet */ | |
943 | } | |
944 | ||
945 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
946 | struct kvm_mp_state *mp_state) | |
947 | { | |
948 | return -EINVAL; /* not implemented yet */ | |
949 | } | |
950 | ||
b31605c1 DD |
951 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
952 | { | |
953 | if (!MACHINE_IS_LPAR) | |
954 | return false; | |
955 | /* only enable for z10 and later */ | |
956 | if (!MACHINE_HAS_EDAT1) | |
957 | return false; | |
958 | if (!kvm->arch.use_cmma) | |
959 | return false; | |
960 | return true; | |
961 | } | |
962 | ||
2c70fe44 CB |
963 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
964 | { | |
965 | /* | |
966 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
967 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
968 | * This ensures that the ipte instruction for this request has | |
969 | * already finished. We might race against a second unmapper that | |
970 | * wants to set the blocking bit. Lets just retry the request loop. | |
971 | */ | |
972 | while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { | |
973 | int rc; | |
974 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
975 | vcpu->arch.sie_block->prefix, | |
976 | PAGE_SIZE * 2); | |
977 | if (rc) | |
978 | return rc; | |
979 | s390_vcpu_unblock(vcpu); | |
980 | } | |
981 | return 0; | |
982 | } | |
983 | ||
24eb3a82 DD |
984 | static long kvm_arch_fault_in_sync(struct kvm_vcpu *vcpu) |
985 | { | |
986 | long rc; | |
987 | hva_t fault = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); | |
988 | struct mm_struct *mm = current->mm; | |
989 | down_read(&mm->mmap_sem); | |
990 | rc = get_user_pages(current, mm, fault, 1, 1, 0, NULL, NULL); | |
991 | up_read(&mm->mmap_sem); | |
992 | return rc; | |
993 | } | |
994 | ||
3c038e6b DD |
995 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
996 | unsigned long token) | |
997 | { | |
998 | struct kvm_s390_interrupt inti; | |
999 | inti.parm64 = token; | |
1000 | ||
1001 | if (start_token) { | |
1002 | inti.type = KVM_S390_INT_PFAULT_INIT; | |
1003 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); | |
1004 | } else { | |
1005 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
1006 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1011 | struct kvm_async_pf *work) | |
1012 | { | |
1013 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1014 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1015 | } | |
1016 | ||
1017 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1018 | struct kvm_async_pf *work) | |
1019 | { | |
1020 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1021 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1022 | } | |
1023 | ||
1024 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1025 | struct kvm_async_pf *work) | |
1026 | { | |
1027 | /* s390 will always inject the page directly */ | |
1028 | } | |
1029 | ||
1030 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1031 | { | |
1032 | /* | |
1033 | * s390 will always inject the page directly, | |
1034 | * but we still want check_async_completion to cleanup | |
1035 | */ | |
1036 | return true; | |
1037 | } | |
1038 | ||
1039 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1040 | { | |
1041 | hva_t hva; | |
1042 | struct kvm_arch_async_pf arch; | |
1043 | int rc; | |
1044 | ||
1045 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1046 | return 0; | |
1047 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1048 | vcpu->arch.pfault_compare) | |
1049 | return 0; | |
1050 | if (psw_extint_disabled(vcpu)) | |
1051 | return 0; | |
1052 | if (kvm_cpu_has_interrupt(vcpu)) | |
1053 | return 0; | |
1054 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1055 | return 0; | |
1056 | if (!vcpu->arch.gmap->pfault_enabled) | |
1057 | return 0; | |
1058 | ||
1059 | hva = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); | |
1060 | if (copy_from_guest(vcpu, &arch.pfault_token, vcpu->arch.pfault_token, 8)) | |
1061 | return 0; | |
1062 | ||
1063 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1064 | return rc; | |
1065 | } | |
1066 | ||
3fb4c40f | 1067 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1068 | { |
3fb4c40f | 1069 | int rc, cpuflags; |
e168bf8d | 1070 | |
3c038e6b DD |
1071 | /* |
1072 | * On s390 notifications for arriving pages will be delivered directly | |
1073 | * to the guest but the house keeping for completed pfaults is | |
1074 | * handled outside the worker. | |
1075 | */ | |
1076 | kvm_check_async_pf_completion(vcpu); | |
1077 | ||
5a32c1af | 1078 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1079 | |
1080 | if (need_resched()) | |
1081 | schedule(); | |
1082 | ||
71cde587 CB |
1083 | if (test_thread_flag(TIF_MCCK_PENDING)) |
1084 | s390_handle_mcck(); | |
1085 | ||
d6b6d166 CO |
1086 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1087 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 1088 | |
2c70fe44 CB |
1089 | rc = kvm_s390_handle_requests(vcpu); |
1090 | if (rc) | |
1091 | return rc; | |
1092 | ||
b0c632db | 1093 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1094 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1095 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1096 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1097 | |
3fb4c40f TH |
1098 | return 0; |
1099 | } | |
1100 | ||
1101 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
1102 | { | |
24eb3a82 | 1103 | int rc = -1; |
2b29a9fd DD |
1104 | |
1105 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1106 | vcpu->arch.sie_block->icptcode); | |
1107 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1108 | ||
3fb4c40f | 1109 | if (exit_reason >= 0) { |
7c470539 | 1110 | rc = 0; |
210b1607 TH |
1111 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1112 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1113 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1114 | current->thread.gmap_addr; | |
1115 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1116 | rc = -EREMOTE; | |
24eb3a82 DD |
1117 | |
1118 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1119 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1120 | current->thread.gmap_pfault = 0; |
3c038e6b DD |
1121 | if (kvm_arch_setup_async_pf(vcpu) || |
1122 | (kvm_arch_fault_in_sync(vcpu) >= 0)) | |
24eb3a82 DD |
1123 | rc = 0; |
1124 | } | |
1125 | ||
1126 | if (rc == -1) { | |
699bde3b CB |
1127 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
1128 | trace_kvm_s390_sie_fault(vcpu); | |
1129 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1f0d0f09 | 1130 | } |
b0c632db | 1131 | |
5a32c1af | 1132 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1133 | |
a76ccff6 TH |
1134 | if (rc == 0) { |
1135 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1136 | /* Don't exit for host interrupts. */ |
1137 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1138 | else |
1139 | rc = kvm_handle_sie_intercept(vcpu); | |
1140 | } | |
1141 | ||
3fb4c40f TH |
1142 | return rc; |
1143 | } | |
1144 | ||
1145 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1146 | { | |
1147 | int rc, exit_reason; | |
1148 | ||
800c1065 TH |
1149 | /* |
1150 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1151 | * ning the guest), so that memslots (and other stuff) are protected | |
1152 | */ | |
1153 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1154 | ||
a76ccff6 TH |
1155 | do { |
1156 | rc = vcpu_pre_run(vcpu); | |
1157 | if (rc) | |
1158 | break; | |
3fb4c40f | 1159 | |
800c1065 | 1160 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1161 | /* |
1162 | * As PF_VCPU will be used in fault handler, between | |
1163 | * guest_enter and guest_exit should be no uaccess. | |
1164 | */ | |
1165 | preempt_disable(); | |
1166 | kvm_guest_enter(); | |
1167 | preempt_enable(); | |
1168 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1169 | vcpu->run->s.regs.gprs); | |
1170 | kvm_guest_exit(); | |
800c1065 | 1171 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1172 | |
1173 | rc = vcpu_post_run(vcpu, exit_reason); | |
1174 | } while (!signal_pending(current) && !rc); | |
3fb4c40f | 1175 | |
800c1065 | 1176 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1177 | return rc; |
b0c632db HC |
1178 | } |
1179 | ||
1180 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1181 | { | |
8f2abe6a | 1182 | int rc; |
b0c632db HC |
1183 | sigset_t sigsaved; |
1184 | ||
b0c632db HC |
1185 | if (vcpu->sigset_active) |
1186 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1187 | ||
9e6dabef | 1188 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 1189 | |
8f2abe6a CB |
1190 | switch (kvm_run->exit_reason) { |
1191 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 1192 | case KVM_EXIT_UNKNOWN: |
9ace903d | 1193 | case KVM_EXIT_INTR: |
8f2abe6a | 1194 | case KVM_EXIT_S390_RESET: |
e168bf8d | 1195 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 1196 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
1197 | break; |
1198 | default: | |
1199 | BUG(); | |
1200 | } | |
1201 | ||
d7b0b5eb CO |
1202 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
1203 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
1204 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
1205 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
1206 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1207 | } | |
9eed0735 CB |
1208 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
1209 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
1210 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
1211 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1212 | } | |
d7b0b5eb | 1213 | |
dab4079d | 1214 | might_fault(); |
a76ccff6 | 1215 | rc = __vcpu_run(vcpu); |
9ace903d | 1216 | |
b1d16c49 CE |
1217 | if (signal_pending(current) && !rc) { |
1218 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1219 | rc = -EINTR; |
b1d16c49 | 1220 | } |
8f2abe6a | 1221 | |
b8e660b8 | 1222 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1223 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1224 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1225 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1226 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1227 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1228 | rc = 0; | |
1229 | } | |
1230 | ||
1231 | if (rc == -EREMOTE) { | |
1232 | /* intercept was handled, but userspace support is needed | |
1233 | * kvm_run has been prepared by the handler */ | |
1234 | rc = 0; | |
1235 | } | |
b0c632db | 1236 | |
d7b0b5eb CO |
1237 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
1238 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 1239 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 1240 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 1241 | |
b0c632db HC |
1242 | if (vcpu->sigset_active) |
1243 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1244 | ||
b0c632db | 1245 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1246 | return rc; |
b0c632db HC |
1247 | } |
1248 | ||
092670cd | 1249 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
1250 | unsigned long n, int prefix) |
1251 | { | |
1252 | if (prefix) | |
1253 | return copy_to_guest(vcpu, guestdest, from, n); | |
1254 | else | |
1255 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * store status at address | |
1260 | * we use have two special cases: | |
1261 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1262 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1263 | */ | |
e879892c | 1264 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 1265 | { |
092670cd | 1266 | unsigned char archmode = 1; |
b0c632db | 1267 | int prefix; |
178bd789 | 1268 | u64 clkcomp; |
b0c632db HC |
1269 | |
1270 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
1271 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
1272 | return -EFAULT; | |
1273 | addr = SAVE_AREA_BASE; | |
1274 | prefix = 0; | |
1275 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
1276 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
1277 | return -EFAULT; | |
1278 | addr = SAVE_AREA_BASE; | |
1279 | prefix = 1; | |
1280 | } else | |
1281 | prefix = 0; | |
1282 | ||
f64ca217 | 1283 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
1284 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
1285 | return -EFAULT; | |
1286 | ||
f64ca217 | 1287 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 1288 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
1289 | return -EFAULT; |
1290 | ||
f64ca217 | 1291 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
1292 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
1293 | return -EFAULT; | |
1294 | ||
f64ca217 | 1295 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
1296 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
1297 | return -EFAULT; | |
1298 | ||
1299 | if (__guestcopy(vcpu, | |
f64ca217 | 1300 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
1301 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
1302 | return -EFAULT; | |
1303 | ||
f64ca217 | 1304 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
1305 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
1306 | return -EFAULT; | |
1307 | ||
f64ca217 | 1308 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
1309 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
1310 | return -EFAULT; | |
1311 | ||
178bd789 | 1312 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
f64ca217 | 1313 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
178bd789 | 1314 | &clkcomp, 8, prefix)) |
b0c632db HC |
1315 | return -EFAULT; |
1316 | ||
f64ca217 | 1317 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 1318 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
1319 | return -EFAULT; |
1320 | ||
1321 | if (__guestcopy(vcpu, | |
f64ca217 | 1322 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
1323 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
1324 | return -EFAULT; | |
1325 | return 0; | |
1326 | } | |
1327 | ||
e879892c TH |
1328 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1329 | { | |
1330 | /* | |
1331 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1332 | * copying in vcpu load/put. Lets update our copies before we save | |
1333 | * it into the save area | |
1334 | */ | |
1335 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1336 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1337 | save_access_regs(vcpu->run->s.regs.acrs); | |
1338 | ||
1339 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1340 | } | |
1341 | ||
d6712df9 CH |
1342 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
1343 | struct kvm_enable_cap *cap) | |
1344 | { | |
1345 | int r; | |
1346 | ||
1347 | if (cap->flags) | |
1348 | return -EINVAL; | |
1349 | ||
1350 | switch (cap->cap) { | |
fa6b7fe9 CH |
1351 | case KVM_CAP_S390_CSS_SUPPORT: |
1352 | if (!vcpu->kvm->arch.css_support) { | |
1353 | vcpu->kvm->arch.css_support = 1; | |
1354 | trace_kvm_s390_enable_css(vcpu->kvm); | |
1355 | } | |
1356 | r = 0; | |
1357 | break; | |
d6712df9 CH |
1358 | default: |
1359 | r = -EINVAL; | |
1360 | break; | |
1361 | } | |
1362 | return r; | |
1363 | } | |
1364 | ||
b0c632db HC |
1365 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1366 | unsigned int ioctl, unsigned long arg) | |
1367 | { | |
1368 | struct kvm_vcpu *vcpu = filp->private_data; | |
1369 | void __user *argp = (void __user *)arg; | |
800c1065 | 1370 | int idx; |
bc923cc9 | 1371 | long r; |
b0c632db | 1372 | |
93736624 AK |
1373 | switch (ioctl) { |
1374 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
1375 | struct kvm_s390_interrupt s390int; |
1376 | ||
93736624 | 1377 | r = -EFAULT; |
ba5c1e9b | 1378 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
1379 | break; |
1380 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
1381 | break; | |
ba5c1e9b | 1382 | } |
b0c632db | 1383 | case KVM_S390_STORE_STATUS: |
800c1065 | 1384 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1385 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1386 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1387 | break; |
b0c632db HC |
1388 | case KVM_S390_SET_INITIAL_PSW: { |
1389 | psw_t psw; | |
1390 | ||
bc923cc9 | 1391 | r = -EFAULT; |
b0c632db | 1392 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1393 | break; |
1394 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1395 | break; | |
b0c632db HC |
1396 | } |
1397 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1398 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1399 | break; | |
14eebd91 CO |
1400 | case KVM_SET_ONE_REG: |
1401 | case KVM_GET_ONE_REG: { | |
1402 | struct kvm_one_reg reg; | |
1403 | r = -EFAULT; | |
1404 | if (copy_from_user(®, argp, sizeof(reg))) | |
1405 | break; | |
1406 | if (ioctl == KVM_SET_ONE_REG) | |
1407 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1408 | else | |
1409 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1410 | break; | |
1411 | } | |
27e0393f CO |
1412 | #ifdef CONFIG_KVM_S390_UCONTROL |
1413 | case KVM_S390_UCAS_MAP: { | |
1414 | struct kvm_s390_ucas_mapping ucasmap; | |
1415 | ||
1416 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1417 | r = -EFAULT; | |
1418 | break; | |
1419 | } | |
1420 | ||
1421 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1422 | r = -EINVAL; | |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1427 | ucasmap.vcpu_addr, ucasmap.length); | |
1428 | break; | |
1429 | } | |
1430 | case KVM_S390_UCAS_UNMAP: { | |
1431 | struct kvm_s390_ucas_mapping ucasmap; | |
1432 | ||
1433 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1434 | r = -EFAULT; | |
1435 | break; | |
1436 | } | |
1437 | ||
1438 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1439 | r = -EINVAL; | |
1440 | break; | |
1441 | } | |
1442 | ||
1443 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1444 | ucasmap.length); | |
1445 | break; | |
1446 | } | |
1447 | #endif | |
ccc7910f CO |
1448 | case KVM_S390_VCPU_FAULT: { |
1449 | r = gmap_fault(arg, vcpu->arch.gmap); | |
1450 | if (!IS_ERR_VALUE(r)) | |
1451 | r = 0; | |
1452 | break; | |
1453 | } | |
d6712df9 CH |
1454 | case KVM_ENABLE_CAP: |
1455 | { | |
1456 | struct kvm_enable_cap cap; | |
1457 | r = -EFAULT; | |
1458 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1459 | break; | |
1460 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1461 | break; | |
1462 | } | |
b0c632db | 1463 | default: |
3e6afcf1 | 1464 | r = -ENOTTY; |
b0c632db | 1465 | } |
bc923cc9 | 1466 | return r; |
b0c632db HC |
1467 | } |
1468 | ||
5b1c1493 CO |
1469 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1470 | { | |
1471 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1472 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1473 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1474 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1475 | get_page(vmf->page); | |
1476 | return 0; | |
1477 | } | |
1478 | #endif | |
1479 | return VM_FAULT_SIGBUS; | |
1480 | } | |
1481 | ||
5587027c | 1482 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
1483 | struct kvm_memory_slot *dont) |
1484 | { | |
1485 | } | |
1486 | ||
5587027c AK |
1487 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1488 | unsigned long npages) | |
db3fe4eb TY |
1489 | { |
1490 | return 0; | |
1491 | } | |
1492 | ||
e59dbe09 TY |
1493 | void kvm_arch_memslots_updated(struct kvm *kvm) |
1494 | { | |
1495 | } | |
1496 | ||
b0c632db | 1497 | /* Section: memory related */ |
f7784b8e MT |
1498 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1499 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1500 | struct kvm_userspace_memory_region *mem, |
1501 | enum kvm_mr_change change) | |
b0c632db | 1502 | { |
dd2887e7 NW |
1503 | /* A few sanity checks. We can have memory slots which have to be |
1504 | located/ended at a segment boundary (1MB). The memory in userland is | |
1505 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1506 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1507 | |
598841ca | 1508 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1509 | return -EINVAL; |
1510 | ||
598841ca | 1511 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1512 | return -EINVAL; |
1513 | ||
f7784b8e MT |
1514 | return 0; |
1515 | } | |
1516 | ||
1517 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1518 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1519 | const struct kvm_memory_slot *old, |
1520 | enum kvm_mr_change change) | |
f7784b8e | 1521 | { |
f7850c92 | 1522 | int rc; |
f7784b8e | 1523 | |
2cef4deb CB |
1524 | /* If the basics of the memslot do not change, we do not want |
1525 | * to update the gmap. Every update causes several unnecessary | |
1526 | * segment translation exceptions. This is usually handled just | |
1527 | * fine by the normal fault handler + gmap, but it will also | |
1528 | * cause faults on the prefix page of running guest CPUs. | |
1529 | */ | |
1530 | if (old->userspace_addr == mem->userspace_addr && | |
1531 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1532 | old->npages * PAGE_SIZE == mem->memory_size) | |
1533 | return; | |
598841ca CO |
1534 | |
1535 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1536 | mem->guest_phys_addr, mem->memory_size); | |
1537 | if (rc) | |
f7850c92 | 1538 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1539 | return; |
b0c632db HC |
1540 | } |
1541 | ||
2df72e9b MT |
1542 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1543 | { | |
1544 | } | |
1545 | ||
1546 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1547 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1548 | { |
1549 | } | |
1550 | ||
b0c632db HC |
1551 | static int __init kvm_s390_init(void) |
1552 | { | |
ef50f7ac | 1553 | int ret; |
0ee75bea | 1554 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1555 | if (ret) |
1556 | return ret; | |
1557 | ||
1558 | /* | |
1559 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1560 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1561 | * only set facilities that are known to work in KVM. |
1562 | */ | |
78c4b59f MM |
1563 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1564 | if (!vfacilities) { | |
ef50f7ac CB |
1565 | kvm_exit(); |
1566 | return -ENOMEM; | |
1567 | } | |
78c4b59f | 1568 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
d208c79d | 1569 | vfacilities[0] &= 0xff82fff3f4fc2000UL; |
7feb6bb8 | 1570 | vfacilities[1] &= 0x005c000000000000UL; |
ef50f7ac | 1571 | return 0; |
b0c632db HC |
1572 | } |
1573 | ||
1574 | static void __exit kvm_s390_exit(void) | |
1575 | { | |
78c4b59f | 1576 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1577 | kvm_exit(); |
1578 | } | |
1579 | ||
1580 | module_init(kvm_s390_init); | |
1581 | module_exit(kvm_s390_exit); | |
566af940 CH |
1582 | |
1583 | /* | |
1584 | * Enable autoloading of the kvm module. | |
1585 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1586 | * since x86 takes a different approach. | |
1587 | */ | |
1588 | #include <linux/miscdevice.h> | |
1589 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1590 | MODULE_ALIAS("devname:kvm"); |